<template>
   <!-- 输入框 -->
  <header class="header">
    <h1>小黑记事本</h1>
    <input 
    @keyup.enter='handleAdd'
    v-model="todoName"
    placeholder="请输入任务" class="new-todo" />
    <button @click="handleAdd" class="add">添加任务</button>
  </header>
</template>

<script>
export default {
  data() {
    return {
      todoName: ''
    }
  },
  methods: {
    handleAdd () {
      this.$emit('add', this.todoName)
    }
  }
}
</script>

<style>

</style>